Pin-fastening machine



May 25 1926.

F. POLZER PIN FASTENING MACHINE 2 Sheets-Sheet 1 Filed April 14, 1925 amount May 25 1926. 1,586,217 F. Pol ZER PIN FASTENING MACHINE Filed April 14 1925 2 sneaks-sheet 2 airman-e1 5 Patented May 25, 1926.

1.58 .217 T orrics.

FRIDOLIN POLZEB, OF NORVALK, CONNECTICUT, ASSIGNOR TO THE E. H. HOTCI-IKISS COMPANY, OF NORWALK, CONNECTICUT, A. CORPORATION OF CONNECTICUT.

PIN-FASTENING MACHINE.

Application filed April: 14, 1925..

This invention relates to devices for securing together a plurality of articles such as sheets of paper and the like, and has for an object to provide an improved device which will secure a plurality of these articles by means of a securing element without clinching, and particularly by means of a straight flat pin.

It is also an object of the invention to provide a device of this character which will cut the individual pins from a strip of in tegrally connected pins and will then insert them through the articles in the proper holding position.

It is a further object of the invention to provide a construction in which after a movement of the operating means for the pin severing and driving mechanism has been started it cannot be returned to its original position without completing its forward stroke, to thus prevent clogging of the machine by an incomplete operation of the same.

lVith these and other objects in View, I have devised the construction illustrated in the accompanying drawings forming a. part of this specification, similar reference characters being employed throughout the various figures to indicate corresponding elements. In these drawings,

F 1 is a longitudinal vertical section of the upper portion of my improved de vice taken substantially on line 11 of Fig. 2, the base portion being shown in elevation. and the elements being shown in the normal position before operation for securing the members is commenced.

Fig. 2 is a partial top plan view and partial section substantially on line 2-2 of Fig. 1.

Fig. 3 is a View similar to Fig. 1 showing the position of the elements after one of the securing elements has been severed from the strip.

Fig. 41 is a similar view showing the elements in the position they occupy at the end of the forward movement of the operating lever.

Fig. 5 is a transverse section substantially on line 55 of Fig. 1.

Fig. 6 is a front elevation with portions of the housing being broken away to more clearly show the construction, the elements being in the position corresponding to Fig. 3.

Serial No. 22,976.

Fig. 7 is a. detail plan and end elevation of the guide for the pin and driving slide.

F ig. 8 is a top plan and end elevation of the driving slide.

F 9 is a top plan view of a portion of a strip of pins for use in this machine.

Fig. 10 is a similar view showing a slightly difi'erent shape of pin.

Fig. 11 is a view similar to Fig. 9 showing means for strengthening the pin.

Fig. 12 is a transverse section of onset the pins on an enlarged scale taken on line 12-12 of Fig. 11.

Fig. 13 is-a View similar to Fig. 10 showing means for strengthening this type of pin, and

Fig. 1 1 is a transverse section of one of the pins of Fig. 13 on an enlarged scale and taken substantially on line 1i1 l.

My improved device comprises a base 15 provided with upwardly extending ears 16 between which is pivoted a housing 1 7 by means of a pivot pin 18 to allow the opposite end of the housing to be lifted for insertion and removal of the articles 19 to be connected. Carried by the base adjacent its opposite end is an anvil 20 curved substantially as shown its upper end to provide a pair of spaced ridges 21 and 22 adapted to seat in correspondingly spaced transverse grooves in the lower surface of the housing, these grooves being separated by a. ridge 28 toextend into the groove between the ridges 21 and 22, so that when the housing is pressed down on sheets of flexible material 19 between the housing and the anvil these sheets will be crimped substantially as shown. The ridge is higher than the ridge 21 and is provided with a groove 22 for passage of a securing pin 2 as will presently be described, the

bottom of this groove being so arrani'i'ed with respect to the top oi the ridge 21 that there is suiticient space beneath. the pin for at least one sheet ofthe articles to be connected, so that after the pin is inserted its point. will be between two adjacent sheets, as shown in Fig. 4-, where the point cannot catch on other articles or injure any one. Although this device is ordinarily intended for use in pinning together sheets of paper it is, of course. adapted for use in pinning together other flat articles, such as cloth and the like and although throughout the specification and claims I use the term pap-er neets, for sake or brevity I wish it to be distinctly understood that by so doing; I do not limit the use of the device for s together sheets oi paper.

liiloun'ed in the housing is the means tor severing the pins from the integral strip and insertii'igthem through the crimped shee s of paper. The housing is provided with \Qltltfil guides 25 in which a plunger 26 mounted to reciprocate, the lower end of this plunger being arranged to cooperate with the tloiura'rtl end 0' a uids and supporting elen'i'ent .3 to c t the in'i'lividui il pins "from the strip. The guide 27 is mounted in a laterally ertending portion 28 of the housing. This laterally extending portion is open on the under side thereof for the insertion of a unit assembly including the guide or support 27 and feeding mechanism for the strip of pins. This assembly comprises a casing 29 adapted to fit in the chamber in the lateral "portion 28 "of the housing, and it is inserted in the same through the open under side of this portion. Mounted in this casing is a sliding cam member 30 guided to reciprocate on transverse pins 31 carried by the casing and extending through an elongated slot 32 in the member 30. The member 30 is reduced at its outer end 33 where it is embraced by a spring b t reacting against the shoulder 35 and pin 86 to tend to movethe member 30 "forwardlly to the position shown in Fig. l, the movements of this member being limited 'by the pins 81 engaging the ends of the slot. A feed pawl 37 is pivoted to the member 30 at 38 and has teeth at its free end to engage the pins on the strip 39 to advance the strip as the member 30 is advanced under the action of the spring 8%. The free end o1 the pawl is held in engagement with the strip by means of a spring 40. A hold-back 41 is pivoted in the casing at 42 and has similar teeth at its free end to engage the pin strip to pre vent backward movement of the strip when the pawl 37 is movedbackwardly over the strip Jt'or a succeeding feeding operation. The holdback is normally held in engagement with the strip by "a spring 413. The casing is open at its under side, in which opening the guide or support 27 is mounted as by means of screws 4-14, and the casing may be secured in the housing by means of transverse pins or screws The member 30 is l tapered at its forward end-as shown at 46 for engagement with a cam lug 47 on the plunger 26. It will be apparent that as the plunger is reeiprocated up and down the member 30 will be reciprocated by means of the cam lug l? and spring 34 to advance the pin strip ilwith a step by step movement to bring the individual pins successively to the severing position under the lower end of the plunger. The plunger is normally held in its upper position by a spring 48 enmeans such as screws or pins at its upper end the lug 50 carried by plunger.

Mounted in the casing is an operating lever preferabl r stantially U-shape in cross section as shown, and it is pivoted in the housing by urea is of a pin Between the sides of iis is mounted a cam member 58 securet. lever to swing therewith by any s itable 'lnis can has an inclined wall to engage the upper end oi the plunger and particularly an inclined cam surface '56 thereon, and the cam member has a surface 57 formed on the arc of circle ith the pin 52 as a center so that as the lever is swung downwardly about its pivot the cam surfaces 55 and 56 will more theplunger downwardly to the position shown in Fig. 3 to sever a pin from the strip 3:), but further downward movement of the lever will not impart any further movement to the plunger because the concentric edge 57 will engage the upper end of the p2 5 1-. This concentric edge will, however, hold the plunger stationary in the position shown in Figs. 3 and t so that the lower end of the plunger will form a guide at the upper side of the severed pin.

Means is provi led to force the severed pin through the crimped portion of the o E? paper or other material 19. For this pose there is mounted at the lower the housing a guide plate fl-E provided with a groove 58 in its upper side in dllgnl'l'lenl' with the plunger, so that as the plun r is forced downwardly to cut pin from the strip the severed pin will lie in the forward end of the groove under the plunger. There is also mounted in this groove and back of the pin a slide or pusher 59 whicl has upwardly extending ears ('30 for pivotal connection with a link 61 connected to one arm 01 a bell crank 62 by me; is o? a pin extending through a slot (34-. The bell crank is pivoted in the housing; at 65 and its other arm is provided with a slot as to receive a pin (57 carried on an arm (35 of the operating lever 51. The bell crank p =f' erably comprises two members on opposides of the ari'n ($8 and the link (ll so t in operation there will be no cramping on the pivotal connections. connected to the by a pin '50 and to the housing a tends to swing this bell crank a clockwise, as viewed in l, 3 and :7 id to thus lift the operating lever and hold it in its upper position and also retract the slide or pusher 59 to the position shown in Fig. l. The slide or pusher 59 will engage tl e head end of the severed pin under the plunger and push it forwardly to the position shown at 2% in Fig. l when the operating lever 51 is moved from the poi-sul en oi Fig. 3 to the position of Fig. 4. A spring finger 7:2 is vmounted on the under side of the guide plate d9 with its free end projecting upwardly through a slot 73 in the bot tom of the guide groove 58 so that this spring will engage the under side of the severed pin and guide it while the slide 59 is pushing it forwardly. lit will also hold the pin in proper position and prevent its dropping out.

It will be apparent that should the operator force the operating lever 51 downwardly part way, say to the position shown in Fig. 3, a pin will be cut off the strip, but if for some reason he should return the lever to the original position without com pleting the forward movement to force the severed pin into the crimped sheets, the pin would lie under the plunger in the groove 58, and if another movement should be given to the operating lever another pin would be cut oil and the machine might be clogged. To prevent this, means is pro.- vided to prevent return of the operating lever 51 to its original position after its forward movement has once been started, unless this movement has been completed to drive the pin. For this purpose a plate 74 is mounted between the sides of the operat ing lever and on the pivot 52. This plate has a flat lower edge resting on the shoulder 75 of the housin so that the plate is held stationary. It is provided on its edge with a series of teeth 7 6 in position to be engaged by the free end of a pawl 77 pivoted to the lever at 78, and a coil spring 79 embraces this pivot pin and is secured at one of its free ends 80 to the lever and at its other free end 81 to the pawl, so that should the pawl swing in either direction from the position of Fig. 1 it will tend to swing the pawl back to this position. At the opposite sides of the teeth 7 6 the plate 74 is provided with notches or recesses 82 and 83 which will allow the free end of the pawl to swing in either direction. Thus should the lever be forced downwardly, say to the position shown in Fig. 3, the pawl 77 will. engage one of the teeth 76 and prevent its return to the original position unless the forward movement is completed to the position shown in Fig. 4, where the notch 83 will allow the pawl to swing in the opposite direction and permit the lever to be swung back to the original position shown in Fig. 1. In this position the notch 82 will allow the pawl to swing and permit another forward or downward movement of the lever. I

The pins for this machine are formed in integral strips as for instance such as illustrated in. Figs. 9 to 1-1, although other shapes of course may be used if desired. The pins are cut from a strip of sheet metal and are left integrally connected at one end as the head end, and this connection is cut as described above the plunger to separate the individual pins from the strip before they are inserted in the crimped sheets of paper. In the form shown in Fig. 9, the pins 84 are substantially of the same width throughout and pointed at one end, and are provided with heads 85 which are connected together. In Fig. 10 the pins 86 are tapered to give a pointed end and to make them relatively wide at the opposite end where they are connected together. In Figs. ll and 12 the pins 87 are substantially the same, as shown in Fig. 9, excepta strengthv ening rib- 88 is formed extending longitudinally of the body of the pin by pressing it into the pin. By this arrangement a pin ot a glven stitlness may be provided from a thinner metal stock, thus giving a saving inthe amount ofmetal required. In Figs. 13

and 1d the pins 89 are similar to the pins .5

of Fig. 10 but are provided with longitudinal strengthening ribs 90 the same as shown 1n Figs. 11 and 12.

The operation will be apparent from the foregoing description. The housing 1? provided with an opening 91 above the guide 27 for insertion of the strip of pins. It will be obvious that the pins must be inserted with their points directed toward the crimping means 20 to 23, and I, therefore, provide means to insure that the strip will be properly inserted in the housing. For this purpose I mount adjacent the inlet opening 91 a starred or toothed wheel 92 mounted in a recess in the guide 27 on a pivot pin 93. It is so located that the teeth project above the top surface of the guide in position to project between the pin if the strip is inserted in proper position, but if the strip is reversed and an attempt made in insert it with the pins pointing in the opposite direction the teeth on this wheel will engage the metal joining the pins together and will prevent insertion of the strip in this position.

Assuming the pins are properly inserted the first or forward pin on the strip when the elements are in the positions shown in Figs. 1., 2 and 5 will lie under the lowe end of the plunger 26. The free end of the housing may be lifted by means of the operating lever 51 and the sheets to be connected may be placed over the anvil 20. ly lowerii'ig the housing the sheets are crimped as shown. The operating lever 21 is then forced downwardly and the cam surfaces 55 and 56 will force the plunger downwardly to the position shown in Figs. 3 and which will out the first pin from the strip and place it'in the groove During this movement of the plunger the slide or pusher 59 has made only a slight movement because of the pin and slot connection 636i, but on further movement of the operating lever from the position shown in Fig. 3 the plunger 96 will remain stationary and form a guide at the upper side of the severed pin while the slide 59 will be advanced under the action :5 the bell crank lever (32. During this ion'ard n'ioveinent the forward end thereot will engage the head end of the pin and push it torvvnrdly under the plunger throu n the notch 22 in the top oil the ridge and through the criuiped sheets it? as indicated in Fig. -l-, but with the free end of the pin bet \ee'n two adjacent sheets so that it is not ertps'ised to catch on other sheets or injure any one,

It will be apparent from the foregoing description the the device is very simple in construction and so may be nnide strong and rigid and in a manner not likely to be easily gctten out of order. The operaton of the device is a very simple one requiring merely the lifting of the free e d the housing by means of the operating lever, placing the sheets to be connected over the crimping anvil, lowering the free end of the,

' housing on the top of the sheets to crimp then and then forcing the lever downwardly as far as it will go. The use o't pins in integral strips makes the device en y to loud and greatly facilitates the handli. of the pins. it Will be appnrent from the drawing that the housing is open on one side so that the operating lever, plunger, bell cranlt and so forth are easily mounted in position and then the open side is closed by a relatively heavy plate 9% which may be secured by suitable screws 95. l t hen in position this plate in sheet forms a part of the housing and supports the opposite ends of the pivot pins 52 and as well as acting to retain the elements in the housin Having thus set forth the nature of my invention, what I claim is:

1. In a device of the character (lGSClli'JCtl, a base, a housing pivoted to the case, coscting paper crimping means carried by the base and housing, means mounted in the housing for severing the individual pins from an to l strip oi preformed pins, and means 7 inserting the severed pin through the crimped paper.

9 ice of the character described,

s. I; a dcv a base, a housing pivoted to the base. courting; pager crimping; means curried by the housing and base, said housing: being provided with a laterally extending portion, feeding means in said lateral portion for advancing a strip of integrally connected pins, and means in the housing; for severing the individual pins from the strip and inserting them through the crimped paper.

3. In a device of the character described, means for crimping e pluralit -x ot fiexil'ile sheets, means ifor advancing a strip of integrally connected pins, means .novable in a direction laterally of the plane of the strip for severing the individual pins from the strip, and means movable substantially parallel with the plane of the strip for inserting the severed pins through the crimped sheets.

4. in a device oi? the character described, a housing, a support for a fiat strip oi integrally connected pins in said housing, feeding means for advancing the strip on the support, said housing being provided with an opening for insertion of said strip,

5; arranged to cooperate with the coin net ions betweei'i the pins for preventing inslrting of the strip except when the points of the pins extend in a certain direction, tor severing the individual pins inserting them in articles to be secured. lln a device oi? toe character described, a housing having a laterally extending portion, a plunger in the housing for severing indivit ral pins from an integral strip, means for crimping a plurality of flexible sheets, means tor inserting the severed pin through the criinped sheets, and a unit asembly arranged to be inserted as a whole nto the housing including a guide for the strip and 'l'eeding means for advancing the stz tobriny; the pins succcsivcly to severing position.

(3, in a device of the character described, a housing having a laterally extending portion open at one side th i, means in the housing to: severing ind' iduel pins from an integral strip, means for inserting the severed pins in articles to be secured, and a unit assembly including a casing, a strip support carried by the casing and feeding means mounted in the casing to advance the strip to bring the pins successively to severing position, said unit arranged to be in sorted in the said open side of the housing, and means for securing it in the housing.

7. In a device of the character described, a reciprocable plunger for severing individual pins from an integral strip, means for feeding a strip of integrally connected pins to bring the pins successively to the severing position, means for crin'iping flexible sheets to be connected, it lGUl)l()Ctll)lG slide for inserting the severed pins in the crimped sheets, and a pivoted lever tor operating the plunger and the slide.

8. In a device or the character described, a base, a housing pivoted to the lase, coacting means carried by the housing and base for crimping flexible sheets, a reciprocable plunger carried by the housing for severing individual pins from an integral strip, feeding means for advancing the strip to bring the pins successively to the severing position, a slide for inserting the severed pins in the crimped sheets, and a lever pivoted in the housing having operative connection with the plunger and the slide.

9. In a device of the character described. a housing, a reciprocable plunger in said housing for severing individual pins from an integral strip, means for feeding the pins to the severing position, a pivoted lever, a cam operated by the lever for shifting the plunger, a slide for inserting the severed pins in articles to be secured, and an operative connection from the lever to the slide.

10. In a device of the character described, a housing, a support in the housing for a strip of pins integrally connected adjacent one end thereof, means for severing the individual pins from the strip and inserting them in articles to be secured, said housing having an opening for insertion of the strip, and a rotary wheel having a plurality of teeth on its periphery arranged to engage the connections between the pins to prevent insertion of the strip with the points of the pins directed in the wrong direction, but to extend between the pins when they point in the opposite direction.

11. In a device of the character described, means for crimping flexible sheets, a support for a strip of integrally connected pins, a reciprocable plunger for severing the individual pins from the strip, a guide beneath the plunger for the severed pins, a slide in the guide for inserting a severed pin through the crimped sheets, and means for operating the plunger and slide in timed relation.

12. In a device of the character described, means for crimping flexible sheets, a sup port for a strip of integrally connected pins, a reciprocable plunger for severing the individual pins from the strip, a guide beneath the plunger for the severed pins, a slide movable in the guide and arranged to engage the head of the pin to force it into the crimped sheets, a spring finger carried by the slide to engage the under side of the pin, and means for operating the plunger and slide.

13. In a device of the character described, a housing, a support in the housing for a strip of integrally connected pins, means for crimping flexible sheets, a reciprocable plunger for severing the individual pins from the strip, a slide for inserting the severed pins in the crimped sheets, a pivoted lever, a cam operated by the lever for shifting the plunger, a pivoted bell crank lever, and operative connections for the bell crank lever to the first lever and to the slide.

14. In a device of the character described, a housing, a support in the housing for a strip of integrally connected pins, means for crimping flexible sheets, a reciprocable plunger for severing the individual pins from the strip, a feeding means for advancing the strip to bring the pins successively to the. severing position and operated by movement of the plunger, a guide below the plunger for the severed pins, a slide movable in the guide arranged to engage the head of a pin to force it through the crimped sheets, a pivoted lever, and operative connections from the lever to the plunger and the slide.

15. In a device of the character described, means for crimping a plurality of superimposed fiexible sheets, means for severing in dividual pins from a strip of integrally connected pins, and means for inserting a severedpin through the crimped sheets so as to leave its point between two adjacent sheets. 16. In a device of the character described, means for severing a securing element from an integral strip of these elements and for driving the individual elements after they have been severed, means for operating said severing and driving-means including a lever pivoted for forward and reverse movements, a pawl pivoted to the lever and arranged to swing in both directions about its pivot, a spring tending to hold it in an intermediate position, a stationary member having a series of teetlrto engage the pawl to prevent reverse movement of the lever unless it is first moved to sufficient distance to drive the securing element, said member being provided with recesses to allow reversal of the pawl at the extremes of the lever movements, an arm on said lever, and means operated by the arm for actuating said driving means.

In testimony whereof I aflix my signature.

FRIDOLIN POLZER. 

